Improvement in piston-packing



ratten .taies jtrtt fftrr,

FRANK J. ROTJL SCHENEVCTADY, NEW YORK.

.Letters Patent No. 77,533,-tated May 5, 1868; antedated April 22, 1868.

IMPROVEMENT innerer-PACKING.

TO ALL WHOM IT MAY CON CERN;` i i Be it known'that I, FRANK J. ROTH, of Schenectady, in the county of Schenectady, and State ot' New York, have invented certain new and useful Improvements in Piston-Packing; and I do hereby declare that the' followingI lis a full, clear, and 'exact description thereof, reference being had to the accompanying drawings, yand to the letters of reference marked thereon, which form .apart of'this specification, in which* Figure 1 is an end viewotpiston, with follower removed;

Figure 2 is an end view of the reverse side of piston, showing a modification of the invention, as'hereinaiter described. l

Figure 3 is a diametriea-l section of piston and packing, and

Figure 4 aview of thepaeking-ring, exhibiting the mode of constructing thes'ame.v

The nature of my invention consists in packing the cylinder of an engine by steam acting upon tliezent;

ends of the paoking-rings, and thereby expanding the paekingto the inner surface of the cylinder, without enter-ing the interior of the piston,l or under the packing-rings.

To enable others sliilled in the art to make and use my invention, I will now describe its construction and operation. i I

In iig. 1 of the annexed drawings, a represents the spider, b the follower, c the central ring, o? packingrings, ff break-joints, and g dovrei-pin. l

-The packing-rings dd are made' somewhat `larger than cylinder. Sutlieient has to be eut out of them to be sprung into cylinder, and still'leave a little play. AUpon the ends of these rings are formed lugs, as fully shown in iig. 4. i v v l 'The pieces or break-joints ff are east in one piece, tted neatly on the lugs offings cl d, turned, and faced to t in annular recess ot' piston, formed by both1 tlangesof piston, and centring,t'hen eut, asrepresented in iig. 1. A modification of this Aarrangement seen in iig. 2, where the pieces are held in contact with the bevelled ends.v of packing-rings d rl by means of the wire spring or loop i, the ends of which pass into holes for their reception in jpieees'ff. l I prefer, however, -tlie arrangement previously described'.

vTheadvantage I claim in this packing over others `is the simplicity of construction, while the pressure of.

steam against packingqings being:r much less than any other steam-packing, itis more durable, and also zi-ins more power of engine. l

The operation of 4my invention is as follows: The action of' steambetween the two pieces fj", at n, presses 1 l said pieces against bevelleii ends of ring` cl, and at the same time against ring e, and thereby cutting ott' all steam from the interior of the packing.

Having thus fully described my invention, what I elaim, and desire to secure by Letters Patent, is- The central ring @break-joints f f,':ind packing-ring @when combined, substantially in the manner herein set forth and described. i l

In testimony that I ela-im the foregongns my, own, I aiix my signature in presence of two witnesses. FRANK J. ROTH.l

Witnesses:

CHARLES Rolin, ANDREW SQHINNERER. 

